Japan's Three Layers of Overseas Asset Reporting: Who Files What, and When

Ask most people about "reporting overseas assets" in Japan and they will name one form: the Overseas Assets Report. In fact, the Act on Submission of Reports concerning Overseas Wire Transfers for the Purpose of Securing Proper Domestic Taxation (the "Reports Act") sets out several reporting regimes side by side, filed by different parties on different timetables — and designed so that they can be checked against one another. What matters is not any individual form but the way these layers overlap.

Layer One: The Overseas Assets Report, Filed by You

A resident (excluding non-permanent residents) holding overseas assets with an aggregate value exceeding ¥50 million as of December 31 must file an Overseas Assets Report — stating name, address, and the type, quantity, and value of each overseas asset, among other particulars — with the competent District Director of the Tax Office by June 30 of the following year (Reports Act, Art. 5(1)).

The test date is December 31; the filing follows by June 30. Whether the obligation arises for a given year is fixed by your position at year-end, which is why the review and organisation of holdings needs to be planned within the year itself.

Layer Two: The Wire Transfer Report, Filed by Your Bank

When a customer carries out an exchange transaction for an overseas remittance through a financial institution's business office, the institution must file a Report on Overseas Wire Transfers — stating the remitter's name and address, the amount, the stated purpose, and other particulars — with the competent District Director of the Tax Office by the last day of the month following the month in which the exchange transaction took place (Reports Act, Art. 4(1)). Excluded are remittances at or below the amount specified by Cabinet Order, which is set at ¥1 million (Order for Enforcement, Art. 8(1)).

This layer is not a taxpayer filing at all but an obligation on the bank: every overseas remittance above ¥1 million reaches the tax office as it happens.

Layer Three: The Assets and Liabilities Report, Triggered by Scale

A person required to file an income tax return whose aggregate total income and timber income for the year exceeds ¥20 million, and who as of December 31 holds assets with an aggregate value of ¥300 million or more, or assets subject to the exit tax rules (securities and similar instruments) with an aggregate value of ¥100 million or more, must file an Assets and Liabilities Report by June 30 of the following year (Reports Act, Art. 6-2(1)).

Where the Overseas Assets Report is defined by where assets sit, this one is triggered by the scale of income and holdings, and calls for a picture of assets and liabilities both inside and outside Japan.

Layered on top of these is the Common Reporting Standard, under which reporting financial institutions provide account information on foreign-resident holders to the tax office each year (Act on Special Provisions of the Income Tax Act, the Corporation Tax Act and the Local Tax Act Incidental to the Enforcement of Tax Treaties, Art. 10-6(1)). What you report, what your bank reports, and what crosses the border through exchange: several channels point at the same assets.

Whether You Filed Matters Separately from the Tax Itself

The Overseas Assets Report carries a distinctive consequence: an adjustment to penalty taxes. Where an amended return or similar adjustment arises in respect of income tax on overseas assets or inheritance tax on overseas assets, and an under-reporting or non-filing penalty applies, the penalty is reduced by an amount equal to 5% if the overseas asset in question was listed on an Overseas Assets Report filed by the deadline (Reports Act, Art. 6(1)). Conversely, where no report was filed by the deadline, or a report was filed but the asset was not listed on it, the penalty is increased by an amount equal to 5% (Art. 6(3)). Filing or not filing shows up as a cost in its own right, distinct from the underlying tax.

Penalties also apply. Filing an Overseas Assets Report containing false statements, or failing without justifiable grounds to file by the deadline, carries imprisonment of up to one year or a fine of up to ¥500,000 (Art. 10; in the case of a failure to file, the sentence may be remitted depending on the circumstances).

Filing a Report Is Not Paying Tax

Conflating the two is among the most common misunderstandings we encounter. Filing a report discloses to the tax office where assets sit and what they are worth; it is not, in itself, a payment of tax. The disadvantage of not filing, however, is certain — it materialises as the increased penalty. Disclosure is not taxation, but neglecting disclosure makes taxation heavier.

Treat It as a Structural Question

In our experience, most problems arise not from deliberate concealment but from a year passing before anyone has established which of these regimes applies. Three things to confirm:

• What is the aggregate value of your overseas assets as of December 31? That determines whether the Overseas Assets Report is required.
• Do your income and holdings reach the Assets and Liabilities Report thresholds? Its scope is assets and liabilities worldwide.
• Does your history of overseas remittances reconcile with the assets and income you have reported? That is where any comparison begins.

The location and valuation of your holdings, the history of your transfers, and your filing position for each year: aligning these three on a single structural diagram, and planning the response within the year, is the starting point for anyone holding assets across borders.

This article provides general information on tax systems and does not constitute individual tax consultation. Specific filings and tax computations are handled by licensed partner tax accountants whom we introduce.